Marcus Perperna Vento (also spelled Perpenna, died 72 BC) was a Roman statesman and general. He betrayed Quintus Sertorius, and was executed by Pompey the Great.
Perperna belonged to the populares faction, led by Gaius Marius and Lucius Cornelius Cinna. After Lucius Cornelius Sulla defeated the populares faction in Italy and became Dictator of Rome, Perperna fled with a substantial sum of money and an army. He took refuge in Hispania (the Iberian Peninsula, comprising modern Spain and Portugal), where he was determined to wage war against Quintus Caecilius Metellus Pius on his own, despite the fact that Sertorius was already present in the province and was more or less ruling it.
However, Perperna's soldiers were dissatisfied with his leadership, and when they learned that Pompey was crossing the Pyrenees, they demanded that Perperna take them to Sertorius, or they would abandon him to Pompey's mercies while they took themselves to Sertorius. Perperna yielded to the demands of the legions, and handed them over to Sertorius. This was not done with good will, and Perperna, conscious of his noble bloodline and wealth, viewed the entire affair as a humiliation.
Sertorius' string of victories soon began to inspire discontent in the Roman nobles and senators that made up the higher classes of his domain. These people grew jealous of Sertorius' power, and Perperna, aspiring to take Sertorius' place, encouraged that jealousy for his own ends. They took to damaging Sertorius' measures for victory, or oppressing the local Iberian tribes in his name. This stirred discontent and revolt in the tribes, which resulted in a cycle of oppression and revolt, with Sertorius none the wiser as to who was creating such mischief.
Perperna then proceeded to invite Sertorius to a feast to celebrate a supposed victory. While under most circumstances, any festivities to which Sertorius was invited were conducted with great propriety, this particular feast was vulgar, designed to offend the skillful general. Disgusted, Sertorius changed his posture on the couch, intent on ignoring them all. At this, Perperna gave the signal to his minions, and they murdered the unsuspecting Sertorius on the spot.